Apache HttpClient连接不畅但我不确定为什么?

时间:2012-07-09 16:33:24

标签: java apache-httpclient-4.x

经过一些使用后,HttpClient似乎在此处阻止,导致我的整个应用冻结:

Thread [main] (Suspended)   
    Unsafe.park(boolean, long) line: not available [native method]  
    LockSupport.park(Object) line: 186  
    AbstractQueuedSynchronizer$ConditionObject.await() line: 2043   
    AbstractConnPool$2(PoolEntryFuture<T>).await(Date) line: 131    
    HttpConnPool(AbstractConnPool<T,C,E>).getPoolEntryBlocking(T, Object, long, TimeUnit, PoolEntryFuture<E>) line: 281 
    AbstractConnPool<T,C,E>.access$000(AbstractConnPool, Object, Object, long, TimeUnit, PoolEntryFuture) line: 62  
    AbstractConnPool$2.getPoolEntry(long, TimeUnit) line: 176   
    AbstractConnPool$2.getPoolEntry(long, TimeUnit) line: 172   
    AbstractConnPool$2(PoolEntryFuture<T>).get(long, TimeUnit) line: 100    
    PoolingClientConnectionManager.leaseConnection(Future<HttpPoolEntry>, long, TimeUnit) line: 212 
    PoolingClientConnectionManager$1.getConnection(long, TimeUnit) line: 199    
    DefaultRequestDirector.execute(HttpHost, HttpRequest, HttpContext) line: 453    
    ContentEncodingHttpClient(AbstractHttpClient).execute(HttpHost, HttpRequest, HttpContext) line: 927 
    ContentEncodingHttpClient(AbstractHttpClient).execute(HttpUriRequest, HttpContext) line: 826    
    ContentEncodingHttpClient(AbstractHttpClient).execute(HttpUriRequest) line: 804 
    ...

我没有在返回的HttpResponse上看到任何“close()”或“release()”方法,我在这里做的不是我需要做什么?

根据请求,这是我的代码:

final HttpResponse hr = Misc.httpClient.execute(hg);
if (hr.getEntity().getContentType().getValue().toLowerCase().contains("html")) {
    final Document doc = Jsoup.parse(hr.getEntity().getContent(), ContentType.getOrDefault(hr.getEntity()).getCharset(), urlAsString);
    processDocument(url, doc);
} else if (hr.getEntity().getContentType().getValue().toLowerCase().contains("text/xml")) {
    final SyndFeedInput input = new SyndFeedInput();

    rssFeed = input.build(new InputStreamReader(hr.getEntity().getContent()));
}

2 个答案:

答案 0 :(得分:8)

您从HttpResponse获得的InputStream需要close()调用它。 HttpResponse本身没有close()

例如,当您获得HttpResponse并致电getEntity()以获取HttpEntity时,请在阅读完内容后调用getContent()获取InputStream,请致电close() InputStream。

答案 1 :(得分:0)

更多细节会有所帮助,但这里有几个原因可能会发生:

  1. 您继续打开与同一服务器的连接,并希望服务器关闭它们,而服务器希望您重用连接(http1.1),以便实际发生泄漏。

  2. 您可能在导致此问题的基础传输(路由等)中出现连接问题,因此httpclient正在等待TCP超时。

  3. 服务器保持连接打开,因为它很忙但尚未回复。